Machine for scalping ingots



(No Model.) e O. G. HORN.

MACHINE FOR SGALPING INGOTS.

No. 284,302. Patented Sept. 4, 1883.

@MW ,fimf yl i/ thicker in some places than at others, so thatspecification.

UNITED STATES ATENT FFIGEQ MACHINE FORSCALPING INGOTS.

SPECIFICATION forming part of Letters Patent No. 284,302, datedSeptember 4, 1883.

Application filed October 31, 1882. (No model.)

To all whom it may concern Be it known that 1, CHARLES C. HORN, ofWaterbury, in the county of New Haven and State of Connecticut, haveinvented certain new and useful Improvements in Machines for ScalpingIngots, of which the following is a My invention relates to improvementsin machines for s'calping ingots preparatory to rolling. It is wellknown that when ingots come from the mold they are rough and imperfectin the surface, owing to oxidation and other causes operation, afterwhich scalping present in casting, so that it is necessary to cleansethe surface from all imperfections, 8w, before rolling them into plateor sheet metal. Sometimes the ingot is put through the rolls severaltimes before the scalping or scraping process the rolling is completed.This scalping is now done by scrapers, which smooth the surface of theingot by taking off a smallportion of the metal at a time, requiringseveral hundred forward and backward movements of the scraper to cleanseone side of an ordinary ingot of German silver. These scrapers have beenmoved both by hand and by machinery, the latter giving greater rapidityto the movement of the i i I 7 others, thereby causingthe metal scraper,but requiring a similar number of movements. This scalpmg byserapersleaves the surface very unequal, and makes the ingot thesubsequent operation of, rolling leaves the metal of greater density insome places than in to warp and oftentimes to crack and break inrolling. This want of uniform density also causes the metal to annealand finish unevenly and oftentimes tobe imperfect when finished.

- The objects of my improvements are to scalp the ingots more rapidlyand at less cost than heretofore, to produce asmooth and even surfacethereon, and to bring them to a uniform thickness throughout theirlength, thereby r I making the rolled metal of auniform density, y

causing it to roll flatand straight without warping, cracking, orbreaking; to annealand finish evenly, and to be free from imperfectionswhen finished; also, to take off thescalp in larger pieces or chips thanheretofore, so that 1 they can be remeltedwithless waste.

I attain these objects by the mechanism illustrated in the accompanyingdrawings, in which- Figure 1 is a plan view of my machine, and Fig. 2 isa vertical section thereof on line 00 m of Fig. 1. I

A designates a box-like frame, open atboth ends, and of a size to admitthe ingot B and its carriage 0. Upon one side of the frame an opening orthroat is left, which extends robliquely across the frame, and in whicha chisel or knife, a, is held by means of set-screws b b. Thecarriage Cis fitted to slide longitudinally in the frame A, a-ndis drivenby therack c and pinion d. It is provided with a shoulder, e, against whichthe end of the ingot B abuts. Packing D, Fig. 2, of any desiredthickness,

may be placed under theingot to raiseit up tothe desired height. Byturning the shaft and the knife, the whole side of an ordinary ingot maybe scalped at asingle operation. In thus pushing the ingot under theknife it should be placed with one edge near the edge g of the'carriageO, and when the knife a acts upon the ingot the inclination of its edgewill have a tendency to force the ingot toward said edge 9. The ingotthen strikes the side h of the frame A, which side acts as a guide toprevent the pinion cl to drive the ingot and carriage under ingot fromworking edgewise while the oblique I knife is scalping the ingot. Thecarriage is then withdrawn and another ingot placed thereon and passedunder theknife, and so on repeatedly. As each ingot is passed throughthe frame and under the knife it is eithertaken off before the carriageis drawn back or it is allowed to-catch upon the back of the knife a andbe held there while the carriage is drawn from under it. In such anevent the next forward movement of the carriage will push the ingot outof the frame. The'shoulder e upon the carriage enables theingot tobcpushed under the knife, while the oblique knife and side h of theframe properly guide the ingot through the machine after it is merelylaid in place upon the carriage, so that there is no necessity forclamping or otherwise fastening the ingot to the carriage. A thickerpacking or more packing is then placed on the carriage, when the ingotsare placed thereon, with their scalped sides toward the packing, andforced under the of different thicknesses furnishes an approximateadjustment todetermine the amount to be removed in scalping, while theknife a may be moved slightly by means of the set-screws b b for a fineradjustment.

While I have shown the rack and pinion for driving the carriage O, I donot wishto confine myself to any particular mechanism for driving saidcarriage, as it may be driven by any ordinary means. If desired, thebottom of the framethat is, the side which is opposite the knifemay bemade adjustable.

I am aware that a prior patent shows a machine having upon itsreciprocating carriagea clamping device to grip one end of a piece ofsheet metal for pulling said metal between a knife and a roller fixed ina stationary bed, both standing squarely across the carriage, so thatthere was no oblique out to the knife. The roller and bed are betweenthe knife and the carriage. Said planing or scraping machine is herebydisclaimed. In my machine there is no stationary bed or roller or otherdevice interposed between the carriage and the knife.

I claim as my invention 1. An ingot-scalping machine consisting of theframe having the knife and open throat upon one side, and" theingot-carriage fitted to slide into said frame and carry the ingot underthe knife, the carriage meantime moving with the ingot and holding it incontact with the knife, substantially as described, and for the purposespecified.

2. In an ingot-scalping machine, the combination of the frame, the knifeextending 0bliquely across said frame, the carriage, mechanism to drivethe carriage with the ingot resting thereon, and means against'whichtheedge of the ingot acts to prevent it from working edgewise under theaction of the oblique knife, substantially as described, and for thepurpose specified.

3. In an ingot-scalping machine, the combination of the frame, the knifeextending 0bliquely across the frame, the guide h at one side of theframe, the carriagehaving the pushing-shoulder c, with a part infront ofsaid shoulder for the ingot to rest upon, and mechanism for driving saidcarriage, substantially as described, and for the purpose specified.

CHARLES C. HORN.

